Modeling method and system for draping process in puncture virtual teaching training system

Abstract

The invention discloses a modeling method and system for a draping process in a puncture virtual teaching training system. The method comprises the steps that a drape is decomposed, wherein the drapeis decomposed into N mass points; the mass points are connected, wherein each mass point is connected with eight adjacent points through elastic pieces; mass point internal force is calculated, mass point external force is calculated, and the position of each mass point in a next frame is acquired; and collision detection is performed on the drape, wherein "ellipsoid bounding volume" collision isadopted, values x, y and z of a vertex are substituted into an equation (shown in the description), and if the calculation result is smaller than or equal to 1, collision occurs, and an ellipsoid collision point is solved. According to the modeling method and system for the draping process in the puncture virtual teaching training system, the drape is decomposed into the N mass points, each mass point is connected with the eight adjacent points through the elastic pieces to establish a model, the position of each mass point in the next frame is acquired by calculating the mass point internal force and the mass point external force, meanwhile, the "ellipsoid bounding volume" collision is adopted to perform collision detection on the drape, the ellipsoid collision point is solved, therefore,a dynamic process of the drape is realized, and the drape is accurately attached to a puncture part.

Description

technical field [0001] The invention relates to a modeling method of a medical teaching and training system, in particular to a modeling method of a draping process in a puncturing virtual teaching and training system and the puncturing virtual teaching and training system. Background technique [0002] The drapery operation in the puncture training requires the use of drapes. At present, most of the methods used are to build bones for the drapes, and then the artist makes different cloth skeleton animations for each action. The disadvantage of this method is that the drapes do not It will change with the surrounding environment. Different fabric bone adjustments are required for different draping parts, which increases the workload and complexity of the artist's work. In addition, if the number of bones in the cloak is not large, it will cause even the adjusted actions to be produces very unsightly effects. [0003] To implement a physical system for cloth, it is required...

AI Technical Summary

Problems solved by technology

[0004] In traditional physics, according to fluid mechanics, the force of each vertex on the hole-towel model can be calculated by Saint-Venant's equations, but in mathematics, Saint-Venant's equations do not have an exact solution, so we need to design a model to find an approximate solution to the equation

Images